/**
  * Filter the query by a related Paciente object
  *
  * @param   Paciente|PropelObjectCollection $paciente The related object(s) to use as filter
  * @param     string $comparison Operator to use for the column comparison, defaults to Criteria::EQUAL
  *
  * @return                 PacientefacturacionQuery The current query, for fluid interface
  * @throws PropelException - if the provided filter is invalid.
  */
 public function filterByPaciente($paciente, $comparison = null)
 {
     if ($paciente instanceof Paciente) {
         return $this->addUsingAlias(PacientefacturacionPeer::IDPACIENTE, $paciente->getIdpaciente(), $comparison);
     } elseif ($paciente instanceof PropelObjectCollection) {
         if (null === $comparison) {
             $comparison = Criteria::IN;
         }
         return $this->addUsingAlias(PacientefacturacionPeer::IDPACIENTE, $paciente->toKeyValue('PrimaryKey', 'Idpaciente'), $comparison);
     } else {
         throw new PropelException('filterByPaciente() only accepts arguments of type Paciente or PropelCollection');
     }
 }